import http, { type Server } from "node:http";
import { promises as fs } from "node:fs";
import { AddressInfo } from "node:net";
import path from "node:path";
import { fileURLToPath, pathToFileURL } from "node:url";
import { expect, test, type Page } from "@playwright/test";
import { expectNoHorizontalOverflow } from "./support";

const specDir = path.dirname(fileURLToPath(import.meta.url));
const repoRoot = path.resolve(specDir, "..", "..", "..");
const dashboardPath = path.join(repoRoot, "docs", "dev_dashboard.html");

interface StaticServer {
  port: number;
  close: () => Promise<void>;
}

interface DashboardMetrics {
  total: number;
  done: number;
  doing: number;
  planned: number;
  ownerCards: number;
  ownerBoard: number;
  crit: number;
  ui: Record<string, string>;
  ownerColumns: Record<string, number>;
  visibleCards: number;
  visibleGroups: number;
  phaseSegments: number;
  trackRows: number;
  trackNames: string[];
  stackSegments: string[];
}

async function startStaticServer(root: string): Promise<StaticServer> {
  const server: Server = http.createServer(async (req, res) => {
    try {
      const requestUrl = new URL(req.url ?? "/", "http://127.0.0.1");
      const requestPath =
        requestUrl.pathname === "/" ? "/docs/dev_dashboard.html" : decodeURIComponent(requestUrl.pathname);
      const normalized = path.normalize(requestPath).replace(/^([/\\])+/, "");
      const filePath = path.join(root, normalized);
      const relative = path.relative(root, filePath);
      if (relative.startsWith("..") || path.isAbsolute(relative)) {
        res.writeHead(403).end("Forbidden");
        return;
      }

      const body = await fs.readFile(filePath);
      res.writeHead(200, { "content-type": contentType(filePath) });
      res.end(body);
    } catch {
      res.writeHead(404).end("Not found");
    }
  });

  await new Promise<void>((resolve) => server.listen(0, resolve));
  const address = server.address();
  if (!address || typeof address === "string") {
    throw new Error("Static dashboard server did not expose a TCP port");
  }
  return {
    port: (address as AddressInfo).port,
    close: () => new Promise<void>((resolve, reject) => server.close((err) => (err ? reject(err) : resolve()))),
  };
}

function contentType(filePath: string) {
  const ext = path.extname(filePath).toLowerCase();
  if (ext === ".html") return "text/html; charset=utf-8";
  if (ext === ".css") return "text/css; charset=utf-8";
  if (ext === ".js" || ext === ".mjs") return "text/javascript; charset=utf-8";
  if (ext === ".png") return "image/png";
  if (ext === ".svg") return "image/svg+xml";
  return "application/octet-stream";
}

async function openDashboard(page: Page, url: string) {
  const errors: string[] = [];
  page.on("console", (msg) => {
    if (msg.type() === "error") errors.push(msg.text());
  });
  page.on("pageerror", (err) => errors.push(err.message));

  const response = await page.goto(url, { waitUntil: "domcontentloaded" });
  if (url.startsWith("http")) {
    expect(response?.ok(), `${url} should load over HTTP`).toBeTruthy();
  }
  await expect(page.locator("#phase-rail .pr-seg")).toHaveCount(6);
  expect(errors).toEqual([]);
}

async function readMetrics(page: Page): Promise<DashboardMetrics> {
  return await page.evaluate(() => {
    const cards = Array.from(document.querySelectorAll<HTMLElement>(".scard"));
    const statusCount = (status: string) => cards.filter((card) => card.dataset.status === status).length;
    const text = (selector: string) => document.querySelector(selector)?.textContent?.trim() ?? "";
    const countOwnerColumn = (column: string) =>
      document.querySelector(`[data-owner-col="${column}"]`)?.querySelectorAll('.ocard[data-owner="1"]').length ?? 0;

    return {
      total: cards.length,
      done: statusCount("done"),
      doing: statusCount("doing"),
      planned: cards.length - statusCount("done") - statusCount("doing"),
      ownerCards: cards.filter((card) => card.dataset.owner === "1").length,
      ownerBoard: document.querySelectorAll('.ocard[data-owner="1"]').length,
      crit: cards.filter((card) => card.querySelector(".critbadge")).length,
      ui: {
        kpiDone: text("#kpi-done"),
        kpiDoing: text("#kpi-doing"),
        kpiPlan: text("#kpi-plan"),
        kpiOwner: text("#kpi-owner"),
        pillOwner: text("#pill-owner"),
        total: text("#g-total"),
        legendDone: text("#lg-done"),
        legendDoing: text("#lg-doing"),
        legendPlan: text("#lg-plan"),
        filterAll: text('[data-count="all"]'),
        filterDone: text('[data-count="done"]'),
        filterDoing: text('[data-count="doing"]'),
        filterPlanned: text('[data-count="planned"]'),
        filterOwner: text('[data-count="owner"]'),
        filterCrit: text('[data-count="crit"]'),
      },
      ownerColumns: {
        block: countOwnerColumn("block"),
        decide: countOwnerColumn("decide"),
        ext: countOwnerColumn("ext"),
      },
      visibleCards: cards.filter((card) => !card.classList.contains("hide")).length,
      visibleGroups: Array.from(document.querySelectorAll<HTMLElement>("#board .track-group")).filter(
        (group) => getComputedStyle(group).display !== "none",
      ).length,
      phaseSegments: document.querySelectorAll("#phase-rail .pr-seg").length,
      trackRows: document.querySelectorAll("#tracks .track").length,
      trackNames: Array.from(document.querySelectorAll("#tracks .track .tname")).map(
        (el) => el.textContent?.trim() ?? "",
      ),
      stackSegments: Array.from(document.querySelectorAll("#stackbar i")).map((el) => el.textContent?.trim() ?? ""),
    };
  });
}

function expectDerivedMetrics(metrics: DashboardMetrics) {
  expect(metrics.total).toBeGreaterThan(0);
  expect(metrics.done).toBe(33);
  expect(metrics.doing).toBe(2);
  expect(metrics.planned).toBe(0);
  expect(metrics.total).toBe(metrics.done + metrics.doing + metrics.planned);
  expect(metrics.ownerBoard).toBe(
    metrics.ownerColumns.block + metrics.ownerColumns.decide + metrics.ownerColumns.ext,
  );
  expect(metrics.ownerBoard).toBeGreaterThan(0);
  expect(metrics.crit).toBe(3);
  expect(metrics.ui).toMatchObject({
    kpiDone: String(metrics.done),
    kpiDoing: String(metrics.doing),
    kpiPlan: String(metrics.planned),
    kpiOwner: String(metrics.ownerBoard),
    pillOwner: String(metrics.ownerBoard),
    total: String(metrics.total),
    legendDone: String(metrics.done),
    legendDoing: String(metrics.doing),
    legendPlan: String(metrics.planned),
    filterAll: String(metrics.total),
    filterDone: String(metrics.done),
    filterDoing: String(metrics.doing),
    filterPlanned: String(metrics.planned),
    filterOwner: String(metrics.ownerCards),
    filterCrit: String(metrics.crit),
  });
  expect(metrics.phaseSegments).toBe(6);
  expect(metrics.trackRows).toBeGreaterThan(1);
  expect(metrics.trackNames).not.toContain("");
  expect(metrics.stackSegments).toEqual(
    [metrics.done, metrics.doing, metrics.planned]
      .filter((count) => count > 0)
      .map(String),
  );
}

async function expectVisibleCards(page: Page, expected: number) {
  await expect
    .poll(async () => (await readMetrics(page)).visibleCards, { message: `expected ${expected} visible cards` })
    .toBe(expected);
}

test.describe.configure({ mode: "serial" });

test.describe("dev dashboard static command center", () => {
  let staticServer: StaticServer;

  test.beforeAll(async () => {
    staticServer = await startStaticServer(repoRoot);
  });

  test.afterAll(async () => {
    await staticServer.close();
  });

  test("derives counters and graphs on local file and HTTP origins", async ({ page }) => {
    const urls = [
      pathToFileURL(dashboardPath).toString(),
      `http://127.0.0.1:${staticServer.port}/docs/dev_dashboard.html`,
      `http://localhost:${staticServer.port}/docs/dev_dashboard.html`,
    ];

    for (const url of urls) {
      await openDashboard(page, url);
      expectDerivedMetrics(await readMetrics(page));
    }
  });

  test("keeps filters stable under empty states, wrong order, and rapid retries", async ({ page }) => {
    await openDashboard(page, `http://127.0.0.1:${staticServer.port}/docs/dev_dashboard.html`);
    const initial = await readMetrics(page);
    expectDerivedMetrics(initial);

    await page.locator('[data-filter="planned"]').click();
    await expectVisibleCards(page, initial.planned);
    await expect(page.locator("#board .track-group").first()).not.toBeVisible();
    await page.locator('[data-filter="done"]').focus();
    await page.keyboard.press("Enter");
    await expect(page.locator('[data-filter="done"]')).toHaveAttribute("aria-pressed", "true");
    await expectVisibleCards(page, initial.done);
    await page.locator('[data-filter="planned"]').focus();
    await page.keyboard.press("Space");
    await expect(page.locator('[data-filter="planned"]')).toHaveAttribute("aria-pressed", "true");
    await expectVisibleCards(page, initial.planned);

    const rapidSequence = ["all", "crit", "doing", "owner", "planned", "done", "all", "crit", "all"];
    await page.evaluate((filters) => {
      for (const filter of filters) {
        document
          .querySelector<HTMLElement>(`[data-filter="${filter}"]`)
          ?.dispatchEvent(new MouseEvent("click", { bubbles: true, cancelable: true }));
      }
    }, rapidSequence);

    await expect(page.locator('[data-filter="all"]')).toHaveAttribute("aria-pressed", "true");
    await expectVisibleCards(page, initial.total);
    expectDerivedMetrics(await readMetrics(page));

    const firstCard = page.locator(".scard").first();
    const firstHead = firstCard.locator(".scard-head");
    await firstHead.click();
    await expect(firstHead).toHaveAttribute("aria-expanded", "true");
    await expect(firstCard).toHaveClass(/open/);
    await page.locator('[data-filter="planned"]').click();
    await expectVisibleCards(page, initial.planned);
    await page.locator('[data-filter="all"]').click();
    await expect(firstHead).toHaveAttribute("aria-expanded", "true");
    await firstHead.click();
    await expect(firstHead).toHaveAttribute("aria-expanded", "false");
  });

  test("keeps local links, images, and hash anchors intact", async ({ page }) => {
    const dashboardUrl = `http://127.0.0.1:${staticServer.port}/docs/dev_dashboard.html`;
    await openDashboard(page, dashboardUrl);

    await page.locator(".owner-pill").click();
    await expect(page).toHaveURL(/#owner$/);
    await expect(page.locator("#owner")).toBeInViewport();
    await page.locator(".kpi.k-done").click();
    await expect(page).toHaveURL(/#board$/);
    await expect(page.locator("#board")).toBeInViewport();

    const references = await page.evaluate(() =>
      Array.from(document.querySelectorAll<HTMLAnchorElement | HTMLImageElement | HTMLLinkElement>("[href],[src]"))
        .map((el) => ({
          tag: el.tagName.toLowerCase(),
          value: el.getAttribute("href") ?? el.getAttribute("src") ?? "",
        }))
        .filter((item) => item.value.length > 0),
    );

    for (const reference of references) {
      if (reference.value.startsWith("#")) {
        await expect(page.locator(reference.value)).toHaveCount(1);
        continue;
      }
      const resolved = new URL(reference.value, dashboardUrl);
      if (resolved.origin !== new URL(dashboardUrl).origin) {
        expect(["http:", "https:"], `${reference.tag} ${reference.value}`).toContain(resolved.protocol);
        continue;
      }
      const response = await page.request.get(resolved.toString());
      expect(response.ok(), `${reference.tag} ${reference.value} should resolve`).toBeTruthy();
    }
  });

  test("supports tab click and keyboard navigation after repeated opening", async ({ page }) => {
    await openDashboard(page, `http://127.0.0.1:${staticServer.port}/docs/dev_dashboard.html`);
    for (const foldId of ["fold-roadmap", "fold-tabs", "fold-narrative"]) {
      const fold = page.locator(`#${foldId}`);
      const summary = fold.locator("summary");
      await summary.click();
      await expect(fold).toHaveJSProperty("open", true);
      await summary.click();
      await expect(fold).toHaveJSProperty("open", false);
      await summary.click();
      await expect(fold).toHaveJSProperty("open", true);
    }

    const tabs = page.locator('[role="tab"][data-tab]');
    const tabCount = await tabs.count();
    expect(tabCount).toBeGreaterThan(3);

    for (let index = tabCount - 1; index >= 0; index -= 1) {
      const tab = tabs.nth(index);
      const panelId = await tab.getAttribute("aria-controls");
      expect(panelId).toBeTruthy();
      await tab.click();
      await expect(tab).toHaveAttribute("aria-selected", "true");
      await expect(page.locator(`#${panelId}`)).toBeVisible();
      await expect(page.locator('[role="tabpanel"]:not([hidden])')).toHaveCount(1);
    }

    await tabs.first().focus();
    await page.keyboard.press("End");
    await expect(tabs.nth(tabCount - 1)).toHaveAttribute("aria-selected", "true");
    await page.keyboard.press("Home");
    await expect(tabs.first()).toHaveAttribute("aria-selected", "true");
    await page.keyboard.press("ArrowRight");
    await expect(tabs.nth(1)).toHaveAttribute("aria-selected", "true");
    await page.keyboard.press("ArrowLeft");
    await expect(tabs.first()).toHaveAttribute("aria-selected", "true");
  });

  test("does not overflow at desktop and mobile widths in the simulated external origin", async ({ page }) => {
    for (const viewport of [
      { width: 1440, height: 900 },
      { width: 390, height: 844 },
      { width: 320, height: 568 },
    ]) {
      await page.setViewportSize(viewport);
      await openDashboard(page, `http://localhost:${staticServer.port}/docs/dev_dashboard.html`);
      await expectNoHorizontalOverflow(page);

      const pulseDetails = page.locator(".pulse-details");
      await expect(pulseDetails).toHaveJSProperty("open", false);
      await pulseDetails.locator("summary").click();
      await expect(pulseDetails).toHaveJSProperty("open", true);
      await expect(pulseDetails).toContainText("b34623f3");
      await expect(pulseDetails).toContainText("실제 mic·동시 high-water·human evidence");
      await pulseDetails.locator("summary").click();
      await expect(pulseDetails).toHaveJSProperty("open", false);

      if (viewport.width <= 760) {
        const controlHeights = await page
          .locator(".owner-pill, .fbtn, .tab-button, .dg-link, .pulse-details summary")
          .evaluateAll((controls) =>
            controls.map((control) => Math.ceil(control.getBoundingClientRect().height)),
          );
        expect(controlHeights.length).toBeGreaterThan(0);
        expect(controlHeights.every((height) => height >= 44)).toBe(true);

        const firstScreenPositions = await page.locator("#phase-rail, .kpis").evaluateAll((regions) =>
          regions.map((region) => Math.floor(region.getBoundingClientRect().top)),
        );
        expect(firstScreenPositions).toHaveLength(2);
        expect(firstScreenPositions.every((top) => top < viewport.height)).toBe(true);
      }
    }
  });
});